7/18/2019 Module 3 2012

1/25

Oil & Gas introduction Course for Non-Engineers SEC

1

Module 3

Offshore Construction

7/18/2019 Module 3 2012

2/25

Oil & Gas introduction Course for Non-Engineers SEC

4

1. Offshore Construction Contractor

OCC = Specialized construction company that erects and installs

offshore infrastructure for Oil companies.

Local Vietnamese:

International:

7/18/2019 Module 3 2012

3/25

Oil & Gas introduction Course for Non-Engineers SEC

5

2. Crane Barge

Hoang Sa (600t) Truong Sa (600t)

Crane Barge = Derrick Barge

7/18/2019 Module 3 2012

4/25

Oil & Gas introduction Course for Non-Engineers SEC

6

3. DSV

Sub sea Construction Vessel

DSV = Diving Support Vessel

DP2 = 2 computer syst.

DP3 = 2+1 back-up

Dynamic Positioning(DP) GPS

7/18/2019 Module 3 2012

5/25

Oil & Gas introduction Course for Non-Engineers SEC

7

4. Shear leg

Ballasting

Shear Leg = Crane with Fixed A-frame

7/18/2019 Module 3 2012

6/25

Oil & Gas introduction Course for Non-Engineers SEC 8

5. Supply boat Supplier

PTSC

Supply Vessel = Vessel to transport cargo to and from Platforms

7/18/2019 Module 3 2012

7/25

Oil & Gas introduction Course for Non-Engineers SEC 9

6. Flat Barge

Dumb Barge or Deck Barge

Used for transport and storage during offshore

construction

7/18/2019 Module 3 2012

8/25

Oil & Gas introduction Course for Non-Engineers SEC 10

7. Tug boat

Highly maneuverable work horse; thrusters;

Capacity:

Bollard Pull = Pulling force; 30 tons 260 tons

Installed power: 3000 - 26000 Horse power

7/18/2019 Module 3 2012

9/25

Oil & Gas introduction Course for Non-Engineers SEC 11

8. Anchor Handler

More power full and maneuverable than supplier

More deck space than tugboat

Specialized vessel to layout anchor pattern for Pipe laying Barges or Semi Subs.

7/18/2019 Module 3 2012

10/25

Oil & Gas introduction Course for Non-Engineers SEC 12

9. Steel Fabrication

Labor intensive,

relatively low tech

Vungtau, VSP

Construction of an metal Offshore Structure

7/18/2019 Module 3 2012

11/25

Oil & Gas introduction Course for Non-Engineers SEC 13

10. Slings

Soft sling =

Aramide fiber

Lifting gear used for moving objects

Grommet =

endless sl ing

Test certi ficate = 6 months valid

Shackle

Steel wire rope

7/18/2019 Module 3 2012

12/25

Oil & Gas introduction Course for Non-Engineers SEC 14

11. Load-out

Loading structure on barge for transport to installation site

7/18/2019 Module 3 2012

13/25

Oil & Gas introduction Course for Non-Engineers SEC 15

12. Skidding

Moving a load by using Hydraulic Jacks

Monkey Climbing

1. Clamp on beam

2. Push object

3. Release clamp cyl inders

4. Retract cyl inder

7/18/2019 Module 3 2012

14/25

Oil & Gas introduction Course for Non-Engineers SEC 16

13. Launch Barge

Barge that can unload a structure without a crane

7/18/2019 Module 3 2012

15/25

Oil & Gas introduction Course for Non-Engineers SEC 17

14. Pil ing

Driving steel piles into the ground

Through the leg piles

Above water p iling

Skirt piles

Sub sea piling

7/18/2019 Module 3 2012

16/25

Oil & Gas introduction Course for Non-Engineers SEC 18

15. Welding

Bonding metal by melting it together

MIG Welding

Welding inspection

Stick or Arc Welding

7/18/2019 Module 3 2012

17/25

Oil & Gas introduction Course for Non-Engineers SEC 19

16. Leveling

Correct verticality after positioning and piling of

the Jacket

Through the leg jacket

leveling

Skirt piles

Jacket leveling

Leveling tool

7/18/2019 Module 3 2012

18/25

Oil & Gas introduction Course for Non-Engineers SEC 20

17. Crane Barge

Create permanent connection by in jection concrete after leveling

Grout line

Pile

Grout injection

area

7/18/2019 Module 3 2012

19/25

Oil & Gas introduction Course for Non-Engineers SEC 21

18. Float over

Installation of topside on jacket using flat barge and jacks

7/18/2019 Module 3 2012

20/25

Oil & Gas introduction Course for Non-Engineers SEC 22

19. Diving

Performing manual work under water

Ai r div ing = Up to 50 m water depth

Sat diving = from 50 m 400 m

Sat System

Dive bell

7/18/2019 Module 3 2012

21/25

Oil & Gas introduction Course for Non-Engineers SEC 23

20. ROV

Remotely Operated Vehicle

WROV = Work class ROV

Inspection ROV

Umbilical =

Wire to the

ROV

ROV Pilot

7/18/2019 Module 3 2012

22/25

Oil & Gas introduction Course for Non-Engineers SEC 24

21. Shift work

24/7 Work schedule

When working offshore most common is a 12 hours shift: 12 hours work, 12

hours rest.

Night shift 6 PM 6 AM

Day shift 6 AM 6 PM

Rotation schedule: 4 weeks on, 2 weeks off

Differs over the world.

7/18/2019 Module 3 2012

23/25

Oil & Gas introduction Course for Non-Engineers SEC 25

22. Crew change

Workforce is replaced at the end of work period

Rotation schedule: 4 weeks on, 2 weeks off

Crew change normally takes place in the weekends.

7/18/2019 Module 3 2012

24/25

Oil & Gas introduction Course for Non-

Engineers SEC 26

23. Crew boat

Boat to transport oil workers to and from shore

Distances up to 800 km

Speed: max. 30 knots (56 km/hr)

Transfer can take up to 30 hours!

Advantage: large capaci ty, low

costs

Disadvantage: slow

7/18/2019 Module 3 2012

25/25

Oil & Gas introduction Course for Non-

Engineers SEC 27

24. Helicopter

Helicopter to transport oi l workers to and from shore

Distances up to 980 km

Speed: max. 260 km/hr

Advantage: speed

Disadvantage: expensive

BOSIET = Basic Offshore Safety

Induction Emergency Training